Drinking Water Production from Rainwater Using Radio Frequency Plasma System

Abstract

Indonesia has a large amount of rainfall and can be used as raw water of drinking water. A Radio frequencyplasma system radiation can produce active compounds (•OH^-, •O, •H⁺, H₂O₂, O₃ etc) in water, the active compounds have a high oxidation potential and can kill microorganisms present in water (fecal coliform, total coliform and Salmonella). Plasma system is one way to produce drinking water in terms of health aspects because in the process the tool does not contact with the material directly, so the possibility of contamination is small. The purpose of this study is to remove microorganisms in rainwater using plasma radio frequency system continuously. Samples will be filtered using pure and mix polypropylene cartridge filter with a pore size of 1 μm and then contact in plasma system. Plasma is generated by applying a frequency of 0,16 MHz through a glass reactor with a thickness of 2 mm which is wrapped by a 1 mm copper wire. The results show that the removal microorganism in rainwater using plasma coupled with filtration using pure polypropylene filter reached 100% for total coliform, fecal coliform and Salmonella. While the removal microorganisms in rainwater using plasma coupled with filtration using mix polypropylene reached 70–100%, 85–100% and 80–100%, for total coliform, fecal coliform and Salmonella, respectively.